There are two ways to know the size of a dataset:
- the /size endpoint, as you mentioned: limited to the datasets compatible with the dataset viewer
- the metadata filled in the README YAML frontmatter
If any of these are available, the size is shown in the right column:
Re:
but it does not work when the dataset is not compatible with the dataset viewer
Most of the datasets should be compatible. A big part of the incompatible datasets are empty repositories.